Drain-valve.



I H. M. KIRBY.

DRAIN VALVE.

APPLICATION FILED SEPT; 6, 1907.

Patented Sept. 14, 1909.

a M v T d w W fl A w m 1 WITNESSES ATTOHNE YS i an.

HOWARD M. KIRBY, OF WILMINGTON, DELAWARE.

DRAIN-VALVE.

Specification of Letters Patent. Patented Sept, 14, jlgfiili,

Application filed September 6, 1907. Serial No. 391,619.

To all whom it may concern:

Be it known that I, HOWARD M. KIRBY, a

citizen of the United States, and a resident of Wilmington, in thecounty of Newcastle and State of Delaware, have invented a new andImproved. Drain-Valve, of which the following 15 a full, clear, andexact descrip-.

tion.

This invention relates to drain valves, and is especially adapted to beused in connection withbathtubs, wash bowls and the like.

The object of the invention is to produce a valve of simpleconstruction, having means for normally holding the valve wide open,

. the valve having such a construction as will enable the valve to'belocked by a simple movement, in its closed position.

Theinvention consists in the construction and combination of parts to bemore fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the'accompany ing drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

- Figure 1 is a vertical section through the.

edge and bottom of a tub to which the invention has been applied; thelower portion of the valve is shown in crosssection and the other partsare shown in elevation; Fig; 2

is a vertical section throughthe lower portion of the valve, upon anenlarged scale,

and showing the parts inthe relation they assume when the valve isclosed; this view is a section on the line 22 of Fig.3; Fig. 3 is ahorizontal section on the line 3-3 of Fig. 2; and Fi 4 is a verticalsection through the ban le of the valve; that is. at the upper edge ofthe tub, from which point the-valve is operated.

Referring morefparticularly to the parts,"

body is connected with an overflow pipe 7 which extends verticallyupward, and 1s connected with the overflow drain or outlet 8 mounted inthe side of the tub, the connection at this point being effected bymeans of a suitable elbow 9-.

The lower side of the valve body a is connected with the drain pipe '10.The interior of the valve body 41 at its point ofconnection with thedrain connection 5, is formed into a valve seat 11, as illustrated mostclearly in Fig. 2. In the interior of the valve and in the upper portionthereof, an car 12 is provided, to which avalve lever 13 is pivotallyattached. The lower end of this valve lever 13 is rigidly connected to'avalve disk 14 which is of roundedor cup form, the convex side of the cupbeing disposed toward the drain connection 5. On the inner face of thisvalve disk 14 a washer or packing cup 15 is attached. As illustrated,the diameter of the disk 14 is considerably less than that of the seat11, so that the edges of the packing cup 15 project beyond the disk 14and come against theseat 11 as shown. To the end of thelever just behindthe central point of the disk 14, astrut or link 16 is pivotallyattached, and the interior of the valve body' opposite to the centralpoint of the disk 14:, is provided with a shoulder or stop 17 whichprojects inwardly as shown. Just above this stop 17 a small recess orgroove 18 is formed in the wall of the valve body, which is slightlyincreased in thickness at this point as shown. The free end of the link16 is rounded as shown, so that when the valve is closed, the link liesin a horizontal position, its free end being held in the groove, recessor notch 18. In this connection, it

v will be understood that the resiliency of the packing cup 15 insuresthat the link will hold itself in position as shown. I

Near the middle point of the link 16, a saddle 19 is pivotally attached,and this saddle is provided with a threaded bolt 20. To this threadedbolt 20 a valve stem 21 is attached, the connection including anenlargement or-head 22 formed on the body of the ment in the guideopenings Having thus described my invention, I

number as shown. These teeth are adapted to'be received in notches 26formed in a knob seat 27 which knob seat is attached to the.

upper side of the flange of the tub, being formed with a suitable nipple28 which passes downwardly through the opening 23' and receives aclamping nut 29, as shown most clearly in Fig. 4. Between the adjacentfaces of the knob and knob seat, a spring chamber 30 is formed, in whichthere is received a helicalspring 31. This spring is a compressionspring, and tends to hold the stem in a mu'ch elevated position, asindicated in Fig.1. This position of the stem holds the valve in a wideopen position, the opening movement of the valve being arrested by thestop or projection 17 which is struck by the lower edgeof the packingcup 15. The teeth 25 and the notches 26 have inclined meeting facesassh'own.

In order toclose the valve, the knob 24 is pushed downwardly so that thelink 16 moves down into the horizontal position shown in Fig. 2. Indoing so, the end of the link 16 snaps into the detentnotch 18 intendedto receive it, and this holds the valve in its closed position. When thevalve is to be opened, a slight rotation of'the knob operates to drawthe stem 21 upwardly, by reason of the fact thatthe inclined edges ofthe;

teeth 25- slide on the inclined edges of the notches 26. In this way theopening movement of the, valve is initiated, and. enables the end of thelink 16 to free itself. As soon as this occurs, the sprin 81. extendsitself and opens the valve to t e'wide open posi-' tion.

Special attention is called to the fact that when the valve is closed,the overflow pipe is unobstructed. When the valve is closed, it will beobserved that the link 16 operates as a strut, jammed as it-'is .betweenthe back of the disk and the valve body.

The fact that the link 16 is pivotally atachedto the valve disk, enablesthe stem tooperate it by arsimple longitudinal moveor thestem.

claim as new and desire to secure by Letters. Patent:'

1. In combination, a valve body having a valve'seat, a movable valvedisk adapted to close, against said seat, a stem, a member connectingsaid stem with sald'valve disk, and pro ect1ng across the lnterlor ofsaid said stem tending to raisethe same and hold said valve disk open,said body having a recess adapted-to receive the end of saidgmember whensaid disk is moved to its closed position, said member beingadapted'tosnap into said recess whereby said body affords means for holding saidmember against the force of 'said'spring,

2. In combination, a valve body having'a ,valve seat, a valve diskpivotally mounted within said body and closing'upon said seat, a linkpivotally attached at the back of said 'disk and extending across theinterior of said body, a stem pivotallyattached to said link, and aspring in'connection with said stem tending to raise' the 'same and'open said spring afiording means for opening said disk when said link1s released from said detent means.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HOWARD M. KIRBY.

Witnesses:

WLL, E. KIRBY, A C. S. MInnLEToN.

valve body, and a spring inconnectionwithdisengage said link from saiddetent means,

said disk, said valve body having a recess having detent means formedon, the wall' and

